SOLUTION: Jack and Jill went up the hill at a rate of 8 units per minute. They came tumbling down at a rate of 8 units per second. What was their average rate, in units per minute, for the r

Question 900271: Jack and Jill went up the hill at a rate of 8 units per minute. They came tumbling down at a rate of 8 units per second. What was their average rate, in units per minute, for the round trip?
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
_________________speed(u/min)_________time_______distance
UP________________8___________________d/8_____________d
DOWN______________60*8________________d/480___________d
Totals______________________________d/8+d/480________2d

The average speed for their round trip was the distance divided by time; using the totals.

Average speed,

, close enough to about 15.75 units per minute
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